Thermodynamic Analysis of a New Power System for Gas Turbine Waste Heat Utilization
Based on the principle of energy grade recovery and cascade utilization,a new power system for gas turbine waste heat utilization was constructed,which was mainly composed of gas turbine Brayton cycle(GTC),recompressive supercritical CO2 Brayton cycle(S-CO2),Rankine cycle(RC),organic Rankine cycle(ORC)and organic flash cycle(OFC).The power system not only overcome the limita-tion of the narrow range of heat recovery in a single sub-cycle,but also realized the cascade utilization of energy by means of heat recovery,thus improving the efficiency of the system.The dynamic system and each sub-cycle were simulated by Aspen HYSYS software,and the influence of working conditions param-eters on the system was further studied.Compared with the data in the existing literature,it shows that each sub-cycle in the power system is well verified.Under the same working conditions,the net power of the power system in the literature is 48 592.84 kW,and the thermal efficiency and exergy efficiency are 42.41％and 62.02％respectively,while the net power of this research system is 50 040.46 kW,and the thermal efficiency and exergy efficiency are 43.673％and 73.593％respectively.Therefore,the new power system has good energy utilization effect.
cascade utilization of waste heatorganic Rankine cyclegas turbine cycleflash evapora-tion power generationsupercritical CO2 Brayton cycle
万方数据
维普
